Investigation of arc treatment of welded joints on high-strength steel

摘要

The influence was studied of arc processing on the change of the structure, impact toughness and nature of fracture of the weld metal on 3OKhGSA steel. Arc processing transforms the cast structure of the columnar crystals of the weld metal and ofoverheated zone of the HAZ into a disoriented structure of refined equiaxial grains. Reduction of microharness and increase of impact toughness are provided, and the nature of metal fracture is changed.